Top 57 Contractors in NAICS 213112: Support Activities for Oil and Gas Operations, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Arctic Slope Regional Corporation Through Asrc Consulting & Environmental Services, LLC Top agencies DOE (Department of Energy) DOI (Department of the Interior)	$51,598,144	35.1%	Rank history: #4 in FY2022, not on the FY2023–FY2024 lists and #2 in FY2025; new, not ranked in FY2020.
2	Tetra Tech-Maytag Aircraft Corporation Joint Venture Top agencies DLA (Defense Logistics Agency)	$38,742,582	26.3%	Rank history: #1 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
3	Weston Solutions Holdings, Inc. Through Weston Solutions Inc. Top agencies DLA (Defense Logistics Agency)	$25,127,970	17.1%	Rank history: #5 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
4	Pond Constructors Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$6,234,588	4.2%	Rank history: #2 in FY2022, not on the FY2023 list, #9 in FY2024 and not on the FY2025 list; down 1 since FY2020.
5	Weston Solutions Inc. Top agencies DLA (Defense Logistics Agency)	$1,165,249	0.8%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
6	A Plus Well Service Inc. Top agencies DOI (Department of the Interior)	$1,159,090	0.8%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
7	Enverus, Inc. Top agencies DOE (Department of Energy) DOI (Department of the Interior)	$776,251	0.5%	Rank history: not on the FY2022 list, #18 in FY2023, #34 in FY2024 and #21 in FY2025; up 3 since FY2020.
8	Welter Consulting, Inc. Top agencies DOI (Department of the Interior)	$599,745	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
9	Continental Industries Field Services, LLC Top agencies DOI (Department of the Interior)	$583,465	0.4%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; up 22 since FY2020.
10	Louis Berger U.S. Inc. Through VGS Infrastructure Services Inc. Top agencies DLA (Defense Logistics Agency)	$475,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	TGS-Nopec Geophysical Company Through A2D Technologies, Inc. Top agencies DOI (Department of the Interior)	$439,973	0.3%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
12	E2 Contracting, Inc. Top agencies DOI (Department of the Interior)	$372,500	0.3%	Rank history: #13 in FY2022, #29 in FY2023, #8 in FY2024 and #8 in FY2025; new, not ranked in FY2020.
13	Acty Co., Ltd. Top agencies Navy (Department of the Navy)	$261,418	0.2%	Rank history: #14 in FY2022, #11 in FY2023, #19 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
14	National Academy of Sciences Top agencies DOI (Department of the Interior)	$260,524	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
15	FD Inc. Top agencies USAF (Department of the Air Force)	$218,722	0.1%	Rank history: #15 in FY2022, #12 in FY2023, #30 in FY2024 and not on the FY2025 list; down 1 since FY2020.
16	D7, LLC Top agencies Army (Department of the Army)	$211,310	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	Wyodak Energy Services, LLC Top agencies DOI (Department of the Interior)	$187,322	0.1%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	Cliffside Refiners L P Top agencies DOI (Department of the Interior)	$169,700	0.1%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
19	Environmental Science Corporation Top agencies USAF (Department of the Air Force)	$168,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	Ryuseki Corporation Top agencies USAF (Department of the Air Force)	$133,345	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
21	Schrass GMBH Top agencies Army (Department of the Army)	$118,530	0.1%	Rank history: #16 in FY2022, #13 in FY2023, #22 in FY2024 and not on the FY2025 list; down 5 since FY2020.
22	Rainy Lake Oil, Inc. Top agencies DOI (Department of the Interior)	$83,000	0.1%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
23	Delsco Northwest, Inc. Top agencies DOI (Department of the Interior)	$69,192	<0.1%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
24	Fluid Solutions LLC Top agencies DOS (Department of State)	$56,413	<0.1%	Rank history: #36 in FY2022, #21 in FY2023, #42 in FY2024 and #29 in FY2025; new, not ranked in FY2020.
25	Horizon Well Logging, Inc. Top agencies DOI (Department of the Interior)	$52,200	<0.1%	Rank history: not on the FY2022 list, #31 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
26	Colonial Group Inc. Through Colonial Fuel and Lubricant Services, Inc. Top agencies DHS (Department of Homeland Security)	$42,024	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	Professional Tank Cleaning, Inc. Top agencies DHS (Department of Homeland Security)	$39,512	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Triple Canopy Inc. Through Strategic Social LLC Top agencies DOS (Department of State)	$36,600	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Nor-Cal Pump & Well Drilling, Inc. Top agencies DOI (Department of the Interior)	$34,537	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
30	Petroleum Recovery Services LLC Top agencies VA (Department of Veterans Affairs)	$31,246	<0.1%	Rank history: #26 in FY2022, #19 in FY2023, #25 in FY2024 and #23 in FY2025; new, not ranked in FY2020.
31	Vetcon Services LLC Top agencies VA (Department of Veterans Affairs)	$29,162	<0.1%	Rank history: #32 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
32	Asterion, LLC Top agencies GAO (Government Accountability Office)	$28,000	<0.1%	Rank history: #25 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
33	Olgoonik Oilfield Services, LLC Top agencies DOI (Department of the Interior)	$25,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 15 since FY2020.
34	Foster Fuels, Inc. Top agencies VA (Department of Veterans Affairs)	$23,664	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	Oil Price Information Service LLC Through IHS Global Inc. Top agencies DOI (Department of the Interior)	$22,961	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
36	SPN Well Services Inc. Top agencies DOI (Department of the Interior)	$22,868	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
37	Mass Tank Inspection Services LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$21,145	<0.1%	Rank history: #39 in FY2022, #38 in FY2023, #50 in FY2024 and #37 in FY2025; up 19 since FY2020.
38	Oil Management Services, Corp. Top agencies VA (Department of Veterans Affairs)	$18,705	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
39	TTI Environmental Inc. Top agencies USDA (Department of Agriculture)	$18,159	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
40	Clean Harbors Inc Through Clean Harbors Environmental Services Inc. Top agencies DHS (Department of Homeland Security)	$15,134	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 15 since FY2020.
41	Tidewater, Inc. Top agencies DOS (Department of State)	$12,975	<0.1%	Rank history: not on the FY2022–FY2023 lists, #37 in FY2024 and #30 in FY2025; new, not ranked in FY2020.
42	Interspec, LLC Top agencies Army (Department of the Army)	$12,629	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
43	Dresser-Argus, Inc. Top agencies DLA (Defense Logistics Agency)	$12,620	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
44	CGG Services (U.S.) Inc. Top agencies DOI (Department of the Interior)	$12,150	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
45	Hart Ventures Inc. Top agencies USDA (Department of Agriculture)	$10,000	<0.1%	Rank history: not on the FY2022 list, #43 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
46	A.m.s. Network, LLC Top agencies DLA (Defense Logistics Agency)	$8,596	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Clean Fuels Associates Inc. Top agencies VA (Department of Veterans Affairs)	$8,075	<0.1%	Rank history: #44 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
48	Petroleum Equipment, Inc. Top agencies VA (Department of Veterans Affairs)	$7,800	<0.1%	Rank history: #35 in FY2022, #42 in FY2023, #39 in FY2024 and #22 in FY2025; new, not ranked in FY2020.
49	Compass Water Solutions, Inc. Top agencies DHS (Department of Homeland Security)	$7,381	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	JF Acquisition, LLC Top agencies VA (Department of Veterans Affairs)	$7,196	<0.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
51	Neumayer Equipment Company Top agencies VA (Department of Veterans Affairs)	$6,684	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Hafer Petroleum Equipment, Ltd. Top agencies VA (Department of Veterans Affairs)	$6,600	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Phoenix Integrity Consultants LLC Top agencies VA (Department of Veterans Affairs)	$4,735	<0.1%	Rank history: #24 in FY2022, #48 in FY2023, not on the FY2024 list and #42 in FY2025; new, not ranked in FY2020.
54	Heath Consultants Inc. Top agencies DOJ (Department of Justice)	$3,750	<0.1%	Rank history: not on the FY2022 list, #51 in FY2023, #48 in FY2024 and #47 in FY2025; new, not ranked in FY2020.
55	Optimal Tank Solutions LLC Top agencies DOJ (Department of Justice)	$2,700	<0.1%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
56	United Rentals, Inc. Top agencies VA (Department of Veterans Affairs)	$2,167	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 30 since FY2020.
57	Government of the United States Through DLA Energy Top agencies DOS (Department of State)	$368	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 9 since FY2020.

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $147 million obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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